Improvement in harrows



J. D. TRAC'H J. F. PLAN.

' HARROW.

No.178,566. Patented .7111181118763 @62" Wr?? u o i I2 v N.FETERS. FNOTOLVTHOGRAFHER| WASHINGTON, D C.

'the tooth O is passed.

UNITED STATES PATENT OEEICE.I

JOHN D. TRACY AND JAMES F. PLATT, OF STERLING, ILLINOIS.

IMPRovEMENT IN HARRows.

Specification forming part of Letters Patent No. 178,566, dated J une 13, 1876; application iled March 4, 1876.

To all whom it may concern:

Be it known that we, JOHN D. TRACY and JAMES F. PLATT, of Sterling, in the county ot' W hitesides and State ot' Illinois, have invented certain new and useful Improvements in Harrows; and we do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled ill the art to which it appertains to make and use the same,ret'erence being had to the accompanying drawings, and 'to the letters of reference marked thereon, which form a part of this specification.

The object of our invention is to so hang or seat barrow-teeth as that when such harrow is drawn from one end the teeth may be arranged perpendicularly, and when drawn from the opposite end such teeth may be arranged with a uniform slant rearward.

Figure l is a side view of a section of harrow-beam, showing our mode of attaching the harrow-tooth. Fig. 2 is a modification of the same.

As our method of fastening the teeth is applicable to vevery harrow susceptible ot' being drawn from either end, thus including all square harrows, whether in sections or otherwise,` and most, it' not all, ot the triangular harrows, we do not deem it necessary to show or describe more than the fastening of the tooth.

A is a section of a harrow-beam, having a hole passing laterally through it at about the lower line of the upper third of its depth. B is all eyebolt, through the eye ot' which The bolt B has at its other end a thread and nut, by means of which the tooth O is firmly held against the side of the beam A. The stops d d are so placed relatively to the bolt B that when the tooth C rests against one stop the tooth will be perpendicular, and when resting against the other stop the tooth will be in such slant as may be desired. The stops d d may be dispensed with by cutting into the beam, as shown'in Fig. 2, and countersinking the eye ot' the bolt BA; but such method unavoidably weakens the harrow-beam or the stops may be dispensed with by drawing the nuts suciently tight to hold the tooth.. Y The advantages of a harroW whose teeth may be readily convertible from the perpenthat the constant jarring Wore the point ot' suspension loose, and also wore away the sides, and also from the fact that, the dirt and rubbish working into the tooth-seat, the tooth being easily moved, the teeth were forced and held respectively in various positions, such modes were not satisfactory.

The advantage we claim for our invention is, first, that the beam is not weakened beyond the hole necessary for the eyebolt B, second,

by means ot' the eyebolt B, the tooth O is so iirinly held that there is no attrition, and no change ot' position of the tooth; and, third, our invention is applicable to the ordinary harrow-tooth-the latter a great desideratum.

In operation the bolt B is drawn sufticiently tight, so as to require a 'smart tap with a hammer or piece of wood to drive the teeth I into the position then required, in which positionthe tooth will then remain until driven in like manner into the other position. The bolt E may be made in form like a staple passing horizontally7 through the beam, and having a thread and nuts on its inner ends, in which case it would be unnecessary to cut into the side of the beam.

We claim as our invention- The eyebolt B, by which the harrow-tooth O may be held at any desired angle, in combination with the tooth C and beam A, substantially as described, and for the purpose mentioned.

In testimony' that we claim the foregoing as our own we affix our signatures in presence of two witnesses.

JOHN D. TRACY. JAMES F. PLATT.

Witnesses J oHN W. ALEXANDER, CLARENCE L. SHELDON. 

